title: [The international intercalibration study on dioxins in foods, analysis of results, and the application in QA/QC].
abstract: OBJECTIVE
  To study the application of international intercalibration study in quality assurance and control (QA/QC) by the analysis of our laboratory' s results from interlaboratory comparison on dioxins in foods from 2005-2012.
  
  
  METHODS
  Z-scores were used to appraise the results from the interlaboratory comparison on dioxins in foods organized by Norwegian Institute of Public Health, and analyze the determination of PCDD/Fs and dl-PCBs in various foods.
  
  
  RESULTS
  The absolute values of z-score of concentrations of PCDD/Fs and dl-PCBs in almost all foods determined by our laboratory are were all less than 1, indicating excellent results.
  
  
  CONCLUSIONS
  The international intercalibration study is a greatly effectively approach of QA/QC. Thus, qualified laboratories should be encouraged more involved in international comparison to improve the detection ability and the reliability of the results.
authors.affiliation: The Key Laboratory of Food Safety Risk Assessment, Ministry of Health (CFSA), and China National Center of 100021, China Food Safety and Risk Assessment, Beijing, China. carpeto@163.com
authors.forename: Lei
authors.initials: L
authors.lastname: Zhang
authors.forename: Jingguang
authors.initials: J
authors.lastname: Li
authors.forename: Yunfeng
authors.initials: Y
authors.lastname: Zhao
authors.forename: Yongning
authors.initials: Y
authors.lastname: Wu
mesh_terms: D004147:Dioxins / Q000032:analysis*; D005504:Food Analysis / Q000379:methods*; D005506:Food Contamination / Q000032:analysis* / Q000517:prevention & control; D011078:Polychlorinated Biphenyls / Q000032:analysis; D000072317:Polychlorinated Dibenzodioxins / Q000031:analogs & derivatives / Q000032:analysis; D011786:Quality Control; D012015:Reference Standards
chemical_list: D004147:Dioxins; D000072317:Polychlorinated Dibenzodioxins; D011078:Polychlorinated Biphenyls